Subtract 42/60 from 5/81
5/81 - 42/60 is -517/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 60 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
5/81 = 5 × 20/81 × 20 = 100/1620 - Likewise, for the 2nd fraction, since 60 × 27 = 1620,
42/60 = 42 × 27/60 × 27 = 1134/1620 - Subtract the two like fractions:
100/1620 - 1134/1620 = 100 - 1134/1620 = -1034/1620 - After reducing the fraction, the answer is -517/810
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